| Parameter | Specification |
|---|---|
| Product Type | Optical Flat |
| Make | Mitutoyo |
| Model Number | 158‑117 |
| Diameter | 45 mm |
| Material | Optical glass with precision polished surface |
| Flatness Accuracy | Typically λ/10 or better (depends on manufacturing tolerance) |
| Surface Finish | Precision lapped and polished |
| Measurement Unit | Metric |
FEATURES
• Precision optical flat for flatness inspection using interference fringes
• High‑grade optical glass ensures accurate and repeatable measurements
• 45 mm diameter suitable for small precision components
• Ideal for use with monochromatic light sources (e.g., sodium lamp)
• Polished surface provides clear and stable fringe patterns
• Excellent for quality control, inspection, and surface verification tasks
